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ASK YOUR TEACHER
PRACTICE ANOTHER
Sketch the region enclosed by the given curves. Decide whether to integrate with respect to x or y. Draw a typical approximating rectangle.
$y = 6 - 3x^2$, $y = 3x^2$, $x = -3$, $x = 3$
20
-4
-2
-20
-40
y
y
40
20
-20
2